1 NCP7LP. A Low-Dropout Positive Fixed and Adjustable Voltage Regulators The NCP7LP is the low power version of the popular NCP7 family of low dropout voltage regulators, with reduced quiescent current. It is intended primarily for high volume consumer applications over the to 5 degree temperature range. Capable of providing an output current in excess of A, with a dropout voltage of. V at A full current load, the series consists of an adjustable and five fixed voltage versions of.5 V,.8 V,.5 V,. V and 5. V. Internal protection features consist of output current limiting and built in thermal shutdown. The NCP7LP series can operate up to 8 V max input voltage. The device is available in the popular SOT and DPAK packages. Features Output Current in Excess of. A.4 V Maximum Dropout Voltage at A Quiescent Current over times Lower than Traditional 7 Fixed Output Voltages of.5 V,.8 V,.5 V,. V and 5. V Adjustable Output Voltage Option No Minimum Load Requirement for Fixed Voltage Output Devices Good Noise Rejection Current Limit and Thermal Shutdown Protection Operation up to 8 V These are Pb Free Devices Applications TV and Monitors Set Top Boxes and Entertainment Devices Switching Power Supply Post Regulation Game Consoles and Consumer Applications Hard Drive Controllers Pin: SOT ST SUFFIX CASE 8H. Adjust/Ground. Output. xx A Y W = 5, 8, 5,, 5, AD = Assembly Location = Year = Work Week = Pb Free Package MARKING DIAGRAM AYW 7Lxx Heatsink tab is connected to Pin. (Note: Microdot may be in either location) 4 DPAK DT SUFFIX CASE 69C 4 AYWW XXX XXXXXG ORDERING INFORMATION See detailed ordering and shipping information in the package dimensions section on page of this data sheet. TYPICAL APPLICATIONS C in = Output NCP7LP + + C out = C in = Output NCP7LP + + C out = Figure. Fixed Output Regulator Figure. Adjustable Output Regulator Semiconductor Components Industries, LLC, 4 December, 4 Rev. 4 Publication Order Number: NCP7LP/D
2 NCP7LP Figure. Block Diagram Table. PIN FUNCTION DESCRIPTION Pin No. Pin Name Description Adj (GND) A resistor divider from this pin to the Vout pin and ground sets the output voltage (Ground only for Fixed Mode). Vout The output of the regulator. A minimum of capacitor ( m ESR ) must be connected from this pin to ground to insure stability. Vin The input pin of regulator. Typically a large storage capacitor ( m ESR ) is connected from this pin to ground to insure that the input voltage does not sag below the minimum dropout voltage during the load transient response. This pin must always be. V (typ.) higher than Vout in order for the device to regulate properly. Table. MAXIMUM RATINGS Rating Symbol Value Unit DC Voltage V in. to 8 V Operating Junction Temperature Range T OP to 5 C Operating Ambient Temperature Range T A to 5 C Maximum Junction Temperature Range T J(max) 55 to 5 C Power Dissipation and Thermal Characteristics Power Dissipation (Note ) Thermal Resistance, Junction to Ambient (Note ) Thermal Resistance, Junction to Case P D R JA R JC Internally Limited 8 5 Electrostatic Discharge Human Body Model ESD V Machine Model Storage Temperature Range T STG 65 to 5 C NOTE: This device series contains ESD protection and exceeds the following tests: ESD HBM tested per AEC Q (EIA/JESD A4) ESD MM tested per AEC Q (EIA/JESD A5) Latch up Current Maximum Rating: 5mA per JEDEC standard: JESD78 Stresses exceeding those listed in the Maximum Ratings table may damage the device. If any of these limits are exceeded, device functionality should not be assumed, damage may occur and reliability may be affected. NOTE: All voltages are referenced to GND pin.. The maximum package power dissipation is: P D T J(max) T A R JA. R JA on a x mm PCB Cu thickness oz; W C/W C/W
3 NCP7LP Table. ELECTRICAL CHARACTERISTICS (Cin =, Cout =, for typical value TA = 5 C, for min and max values TA is the operating ambient temperature range that applies unless otherwise noted.) Parameter Conditions Symbol Min Typ Max Unit Reference Voltage, Adjustable Output Devices NCP7 ADJ T J = 5 C (Vin Vout) =.5 V, Io = ma V ref V Output Voltage, Fixed Output Devices Line Regulation, Adjustable & Fixed (Note ) Load Regulation (Note ) Dropout Voltage (Vin Vout), Adjustable & Fixed NCP7.5 T J = 5 C V Vin V, Io = ma NCP7.8 T J = 5 C. V Vin V, Io = ma NCP7.5 T J = 5 C 4 V Vin V, Io = ma NCP7. T J = 5 C 4.8 V Vin V, Io = ma NCP7 5. T J = 5 C 6.5 V Vin V, Io = ma NCP7 XXX T J = 5 C Vout +.5 V < Vin < V, Io = ma NCP7 ADJ T J = 5 C ma < Io < A, Vin =. V NCP7.5 T J = 5 C ma < Io < A, Vin = V NCP7.8 T J = 5 C ma < Io < A, Vin =. V NCP7.5 T J = 5 C ma < Io < A, Vin = 4 V NCP7. T J = 5 C ma < Io < A, Vin = 4.7 V NCP7 5. T J = 5 C ma < Io < A, Vin = 6.5 V NCP7 XXX Iout = A, Vout = Vout mv V out V V V V V Reg line. % Reg load % 5 mv 5 8 mv 5 mv 6 mv 4 5 mv..4 V Current Limit, Adjustable & Fixed Minimum Load Current (Note 4) NCP7 XXX Vin = 7 V, Iout. A NCP7 XXX C Tj 5 C I Lmin 5 ma Quiescent Current NCP7 fixed Vin = V I QFIX 55 7 A NCP7 ADJ Io = ma I QADJ 5 A Thermal Regulation (Note 5), T = ms pulse.8.4 %W Ripple Rejection NCP7 XXX F = Hz, Cout = 5 tantalum, Iout = A, Vin = Vout + V RR 6 db Thermal Shutdown NCP7 XXX T shdn 65 C Thermal Hysteresis NCP7 XXX T hyst C Product parametric performance is indicated in the Electrical Characteristics for the listed test conditions, unless otherwise noted. Product performance may not be indicated by the Electrical Characteristics if operated under different conditions.. Low duty cycle pulse techniques are used during testing to maintain the junction temperature as close to ambient as possible. 4. Guaranteed by design. 5. Thermal Regulation is defined as the change in output voltage at a time after a change in power dissipation is applied, excluding load or line regulation effects. Specifications are for a current pulse equal to Io max at VIN = VIN +.5 V for T = msec. Guaranteed by characterization.
4 NCP7LP TYPICAL CHARACTERISTICS DROPOUT VOLTAGE (V) T A, AMBIENT TEMPERATURE ( C) Figure 4. Dropout Voltage vs. Temperature I load = ma 6 8 DROPOUT VOLTAGE (V) T A, AMBIENT TEMPERATURE ( C) Figure 5. Dropout Voltage vs. Temperature I load = A DEVIATION (%) T A, AMBIENT TEMPERATURE ( C) Figure 6. Line Regulation vs. Temperature I load = ma 6 8 DEVIATION (%) T A, AMBIENT TEMPERATURE ( C) Figure 7. Load Regulation vs. Temperature I load = A 6 8 (V) T A, AMBIENT TEMPERATURE ( C) Figure 8. Output Voltage vs. Temperature I load = ma OUTPUT SHORT CIRCUIT CURRENT (A) T A, AMBIENT TEMPERATURE ( C) Figure 9. Output Short Circuit Current vs. Temperature 4
5 NCP7LP TYPICAL CHARACTERISTICS QUIESCENT CURRENT ( A) V in = V I load = ma C in = C out = T A, AMBIENT TEMPERATURE ( C) Figure. Quiescent Current vs. Temperature I load = ma 6 8 DROPOUT VOLTAGE (V) I out, OUTPUT CURRENT (A) V out = V out mv C in = C out = T J = 5 C.8.9. Figure. Dropout Voltage vs. Output Current ESR (m ) Region of Stability. Region of Instability.4.6 V in = V V out =.5 V C in = MLCC C out = MLCC T J = 5 C.8. OUTPUT CAPACITANCE () Region of Instability. V in = V V out =.5 V I load = 5 ma A C in = MLCC T J = 5 C... Region of Stability. I out, OUTPUT CURRENT (A) Figure. Equivalent Series Resistance vs. Output Current MLCC Capacitor ESR, EQUIVALENT SERIES RESISTANCE ( ) Figure. Output Capacitance vs. ESR MLCC Capacitor 8 7 RR, RIPPLE REJECTION (db) f ripple = Hz C in = Tantalum C out = Tantalum V in V out = V I out, OUTPUT CURRENT (A) 8 9 Figure 4. Ripple Rejection vs. Output Current.5 V RR, RIPPLE REJECTION (db) f ripple = Hz C in = Tantalum C out = Tantalum V in V out = V I out, OUTPUT CURRENT (A) 9 Figure 5. Ripple Rejection vs. Output Current 5 V 5
6 NCP7LP TYPICAL CHARACTERISTICS RR, RIPPLE REJECTION (db) A. A A.5 A C in = Tantalum C out = Tantalum V in V out = V.5 Vpp V/sqrt (Hz) 45E 9 4E 9 5E 9 E 9 5E 9 E 9 5E 9 E 9 5E 9 A. A C in = Tantalum C out = Tantalum V in V out = V.5 A f ripple, RIPPLE FREQUENCY (Hz) FREQUENCY (Hz) Figure 6. Ripple Rejection vs. Frequency V out =.5 V Figure 7. Output Spectral Noise Density vs. Frequency V out = V5 INPUT VOLTAGE (V) V/ s 4.. C in =. * C out = * I out =. A C in =. * C out = * I out =.5 A 5 5 Figure 8. Line Transient Response V out =.5 V Figure 9. Line Transient Response V out =.5 V INPUT VOLTAGE (V) V/ s C in =. * C out = * I out =. A C in =. * C out = * I out =.5 A 5 Figure. Line Transient Response V out =.8 V Figure. Line Transient Response V out =.8 V 6
7 NCP7LP TYPICAL CHARACTERISTICS INPUT VOLTAGE (V) V/ s C in =. * C out = * I out =. A C in =. * C out = * I out =.5 A 5 5 Figure. Line Transient Response V out =.5 V Figure. Line Transient Response V out =.5 V INPUT VOLTAGE (V) V/ s C in =. * C out = * I out =. A C in =. * C out = * I out =.5 A 5 5 Figure 4. Line Transient Response V out =. V Figure 5. Line Transient Response V out =. V INPUT VOLTAGE (V) V/ s C in =. * C out = * I out =. A C in =. * C out = * I out =.5 A 5 5 Figure 6. Line Transient Response V out = 5. V Figure 7. Line Transient Response V out = 5. V 7
8 NCP7LP TYPICAL CHARACTERISTICS LOAD CURRENT CHANGE (A).5A/ s.5. C in = * C out = * V in =. V Preload=.A LOAD CURRENT CHANGE (A).5A/ s.5. C in = * C out = * V in =. V Preload=.A Figure 8. Load Transient Response V out =.8 V Figure 9. Load Transient Response V out =.5 V LOAD CURRENT CHANGE (A).5A/ s.5. C in = * C out = * V in =. V Preload=.A LOAD CURRENT CHANGE (A).5A/ s.5. C in = * C out = * V in =. V Preload=.A Figure. Load Transient Response V out =. V Figure. Load Transient Response V out = 5. V 8
9 NCP7LP TYPICAL CHARACTERISTICS Theta JA (C/W) Power curve with PCB cu thk. oz Power curve with PCB cu thk. oz Theta JA curve with PCB cu thk. oz Theta JA curve with PCB cu thk. oz Max Power (W) Copper heat spreader area (mm^) Figure. SOT Thermal Resistance and Maximum Power Dissipation vs. P.C.B. Copper Length 9
10 NCP7LP APPLICATIONS INFORMATION Introduction The NCP7LP is a low dropout positive fixed or adjustable mode regulator with A output capability. This LDO is guaranteed to have a significant reduction in dropout voltage along with enhanced output voltage accuracy and temperature stability when compared to older industry standard three terminal adjustable regulators. These devices contain output current limiting, safe operating area compensation and thermal shutdown protection making them designer friendly for powering numerous consumer and industrial products. The NCP7LP series is pin compatible with the older NCP7. Output Voltage The typical application circuits for the fixed and adjustable output regulators are shown in Figures and 4. The adjustable devices are floating voltage regulators. They develop and maintain the nominal.5 V reference voltage between the output and adjust pins. The reference voltage is programmed to a constant current source by resistor R, and this current flows through R to ground to set the output voltage. The programmed current level is usually selected to be greater than the specified 5. ma minimum that is required for regulation. Since the adjust pin current, I adj, is significantly lower and constant with respect to the programmed load current, it generates a small output voltage error that can usually be ignored. For the fixed output devices R and R are included within the device and the ground current I gnd is 55 A (typ). External Capacitors bypass capacitor C in may be required for regulator stability if the device is located more than a few inches from the power source. This capacitor will reduce the circuit s sensitivity when powered from a complex source impedance and significantly enhance the output transient response. The input bypass capacitor should be mounted with the shortest possible track length directly across the regulator s input and ground terminals. A ceramic or tantalum capacitor should be adequate for most applications. C in Output NCP7LP + + Cout I gnd Figure. Fixed Output Regulator Frequency compensation for the regulator is provided by capacitor C out and its use is mandatory to ensure output stability. A minimum capacitance value of 4.7 with an equivalent series resistance (ESR) that is within the limits of m to is required. The capacitor type can be ceramic, tantalum, or aluminum electrolytic as long as it meets the minimum capacitance value and ESR limits over the circuit s entire operating temperature range. Higher values of output capacitance can be used to enhance loop stability and transient response with the additional benefit of reducing output noise. C in Output NCP7LP + + R V ref Cout I adj R + Cadj Vout Vref R R R I adj Figure 4. Adjustable Output Regulator The output ripple will increase linearly for fixed and adjustable devices as the ratio of output voltage to the reference voltage increases. For example, with a 5 V regulator, the output ripple will increase by 5 V/.5 V or 4 and the ripple rejection will decrease by log of this ratio or db. The loss of ripple rejection can be restored to the values shown with the addition of bypass capacitor C adj, shown in Figure 4. The reactance of C adj at the ripple frequency must be less than the resistance of R. The value of R can be selected to provide the minimum required load current to maintain regulation and is usually in the range of to. Cadj fripple R The minimum required capacitance can be calculated from the above formula. When using the device in an application that is powered from the AC line via a transformer and a full wave bridge, the value for C adj is: fripple Hz, R, then Cadj. The value for C adj is significantly reduced in applications where the input ripple frequency is high. If used as a post regulator in a switching converter under the following conditions: fripple 5 khz, R, then Cadj.7
11 NCP7LP Protection Diodes The NCP7LP family has two internal low impedance diode paths that normally do not require protection when used in the typical regulator applications. The first path connects between V out and V in, and it can withstand a peak surge current of about 5 A. Normal cycling of V in cannot generate a current surge of this magnitude. Only when V in is shorted or crowbarred to ground and C out is greater than 5, it becomes possible for device damage to occur. Under these conditions, diode D is required to protect the device. The second path connects between C adj and V out, and it can withstand a peak surge current of about 5 ma. Protection diode D is required if the output is shorted or crowbarred to ground and C adj is greater than.. C in D Output NCP7LP + + R D Cout R + Cadj Figure 5. Protection Diode Placement A combination of protection diodes D and D may be required in the event that V in is shorted to ground and C adj is greater than 5. The peak current capability stated for the internal diodes are for a time of s with a junction temperature of 5 C. These values may vary and are to be used as a general guide. Load Regulation The NCP7LP series is capable of providing excellent load regulation; but since these are three terminal devices, only partial remote load sensing is possible. There are two conditions that must be met to achieve the maximum available load regulation performance. The first is that the top side of programming resistor R should be connected as close to the regulator case as practicable. This will minimize the voltage drop caused by wiring resistance RW + from appearing in series with reference voltage that is across R. The second condition is that the ground end of R should be connected directly to the load. This allows true Kelvin sensing where the regulator compensates for the voltage drop caused by wiring resistance RW. C in + NCP7LP RW+ Output R R + Cout RW Figure 6. Load Sensing Remote Load Thermal Considerations This series contains an internal thermal limiting circuit that is designed to protect the regulator in the event that the maximum junction temperature is exceeded. When activated, typically at 65 C, the regulator output switches off and then back on as the die cools. As a result, if the device is continuously operated in an overheated condition, the output will appear to be oscillating. This feature provides protection from a catastrophic device failure due to accidental overheating. It is not intended to be used as a substitute for proper heatsinking. The maximum device power dissipation can be calculated by: PD T J(max) TA R JA The devices are available in surface mount SOT package. This package has an exposed metal tab that is specifically designed to reduce the junction to air thermal resistance, R JA, by utilizing the printed circuit board copper as a heat dissipater. Figure shows typical R JA values that can be obtained from a square pattern using economical single sided. oz and. oz copper board material. The final product thermal limits should be tested and quantified in order to insure acceptable performance and reliability. The actual R JA can vary considerably from the graphs shown. This will be due to any changes made in the copper aspect ratio of the final layout, adjacent heat sources, and air flow. Constant Current Output R NCP7LP + + Iout V ref R I adj Figure 7. Constant Current Regulator
12 NCP7LP Output NCP7LP + + R 5 k N4 Output NCP7LP + + R R R N97 N Figure 8. Slow Turn On Regulator Output Voltage Control Resistor R sets the maximum output voltage. Each transistor reduces the output voltage when turned on. Figure 9. Digitally Controlled Regulator Output NCP7LP + + Output NCP7LP 5. V to + + V Output Control. k 6 N On Off. k Vout(Off) Vref Figure 4. Regulator with Shutdown. k + Figure 4. Adjusting Output of Fixed Voltage Regulators DEVICE ORDERING INFORMATION NCP7LPST5TG NCP7LPST8TG NCP7LPST5TG NCP7LPSTTG NCP7LPST5TG NCP7LPSTADTG NCP7LPDT8RKG NCP7LPDTRKG NCP7LPDTADJRKG Device Package Shipping SOT (Pb Free) DPAK (Pb Free) 4 / Tape & Reel 5 / Tape & Reel For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specifications Brochure, BRD8/D.
13 NCP7LP PACKAGE DIMENSIONS b H. M C A S (b) B S D A ÉÉÉÉÉÉÉ ÇÇÇÇÇÇÇ b SECTION B B 4 E SOT ST SUFFIX CASE 8H ISSUE O. M C B S C B B E A A L e B e c (b).8 b A A ÉÉÉ ÇÇÇ b c SECTION A A SOLDERING FOOTPRINT*.8.5. M C A S B S NOTES:. DIMENSIONS ARE IN MILLIMETERS.. INTERPRET DIMENSIONS AND TOLERANCES PER ASME Y4.5M, DIMENSION E DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSION. INTERLEAD FLASH OR PROTRUSION SHALL NOT EXCEED. PER SIDE. 4. DIMENSIONS b AND b DO NOT INCLUDE DAMBAR PROTRUSION. ALLOWABLE DAMBAR PROTRUSION SHALL BE.8 TOTAL IN EXCESS OF THE b AND b DIMENSIONS AT MAXIMUM MATERIAL CONDITION. 5. TERMINAL NUMBERS ARE SHOWN FOR REFERENCE ONLY. 6. DIMENSIONS D AND E ARE TO BE DETERMINED AT DATUM PLANE H. MILLIMETERS DIM MIN MAX A A.. b.6.88 b.6.8 b.9. b.9.5 c.4.5 c.4. D E E..7 e. e 4.6 L SCALE 6: mm inches *For additional information on our Pb Free strategy and soldering details, please download the ON Semiconductor Soldering and Mounting Techniques Reference Manual, SOLDERRM/D.
14 NCP7LP PACKAGE DIMENSIONS DPAK (SINGLE GAUGE) DT SUFFIX CASE 69C ISSUE E L E b 4 A D B DETAIL A A C c H Z Z NOTES:. DIMENSIONING AND TOLERANCING PER ASME Y4.5M, CONTROLLING DIMENSION: INCHES.. THERMAL PAD CONTOUR OPTIONAL WITHIN DI- MENSIONS b, L and Z. 4. DIMENSIONS D AND E DO NOT INCLUDE MOLD FLASH, PROTRUSIONS, OR BURRS. MOLD FLASH, PROTRUSIONS, OR GATE BURRS SHALL NOT EXCEED.6 INCHES PER SIDE. 5. DIMENSIONS D AND E ARE DETERMINED AT THE OUTERMOST EXTREMES OF THE PLASTIC BODY. 6. DATUMS A AND B ARE DETERMINED AT DATUM PLANE H. 7. OPTIONAL MOLD FEATURE. L4 b e b TOP VIEW NOTE 7 c SIDE VIEW.5 (.) M C L GAUGE PLANE BOTTOM VIEW L L DETAIL A ROTATED 9 CW A H BOTTOM VIEW ALTERNATE CONSTRUCTION C SEATING PLANE INCHES MILLIMETERS DIM MIN MAX MIN MAX A A..5.. b b b c c D E e.9 BSC.9 BSC H L L.4 REF.9 REF L. BSC.5 BSC L L4.4. Z.55.9 SOLDERING FOOTPRINT* SCALE : mm inches *For additional information on our Pb Free strategy and soldering details, please download the ON Semiconductor Soldering and Mounting Techniques Reference Manual, SOLDERRM/D. ON Semiconductor and are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC owns the rights to a number of patents, trademarks, copyrights, trade secrets, and other intellectual property. A listing of SCILLC s product/patent coverage may be accessed at /site/pdf/patent Marking.pdf. SCILLC reserves the right to make changes without further notice to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. Typical parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including Typicals must be validated for each customer application by customer s technical experts. SCILLC does not convey any license under its patent rights nor the rights of others. SCILLC products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the SCILLC product could create a situation where personal injury or death may occur. Should Buyer purchase or use SCILLC products for any such unintended or unauthorized application, Buyer shall indemnify and hold SCILLC and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that SCILLC was negligent regarding the design or manufacture of the part. SCILLC is an Equal Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner. PUBLICATION ORDERING INFORMATION LITERATURE FULFILLMENT: Literature Distribution Center for ON Semiconductor P.O. Box 56, Denver, Colorado 87 USA Phone: or Toll Free USA/Canada Fax: or Toll Free USA/Canada N. American Technical Support: Toll Free USA/Canada Europe, Middle East and Africa Technical Support: Phone: Japan Customer Focus Center Phone: ON Semiconductor Website: Order Literature: For additional information, please contact your local Sales Representative NCP7LPD